<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>购物车案例</title>
  <style>
    table {
      border-collapse: collapse;
      text-align: center;
    }

    thead {
      background-color: #f2f2f2;
    }

    td, th {
      padding: 10px 16px;
      border: 1px solid #aaa;
    }
  </style>
</head>
<body>
  
  <div id="root"></div>

  <script src="../lib/react.js"></script>
  <script src="../lib/react-dom.js"></script>
  <script src="../lib/babel.js"></script>

  <script src="./data.js"></script>

  <script type="text/babel">
    // 1.定义App根组件
    class App extends React.Component {
      constructor() {
        super()
        this.state = {
          books: books
        }
      }

      render() {
        const { books } = this.state

        return (
          <div>
            <table>
              <thead>
                <tr>
                  <th>序号</th>
                  <th>书籍名称</th>
                  <th>出版日期</th>
                  <th>价格</th>
                  <th>购买数量</th>
                  <th>操作</th>
                </tr>
              </thead>
              <tbody>
                {
                  books.map((item, index) => {
                    return (
                      <tr>
                        <td>{index + 1}</td>
                        <td>{item.name}</td>
                        <td>{item.date}</td>
                        <td>{"¥" + item.price}</td>
                        <td>
                          <button>-</button>
                          {item.count}
                          <button>+</button>
                        </td>
                        <td><button>删除</button></td>
                      </tr>
                    )
                  })
                }
              </tbody>
            </table>
          </div>
        )
      }
    }

    // 2.创建root并且渲染App组件
    const root = ReactDOM.createRoot(document.querySelector("#root"))
    root.render(<App/>)
  </script>

</body>
</html>